jquery Operation <input type= "checkbox" >

<input type= "checkbox";:

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2012欧洲杯"死亡之组"小组出线的国家队是：<br><inputtype="checkbox" name="nation" value="Germany">德国<input type="checkbox" name="nation" value="Denmark">丹麦<input type="checkbox" name="nation" value="Holland">荷兰<inputtype="checkbox" name="nation" value="Portugal">葡萄牙

1, the first and second team to qualify, so to limit only two items to be selected.

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varlen = $("input[name=‘nation‘]:checked").length;if(len==0) {     alert("请选择出线的国家队！");     returnfalse;}elseif(len<2) {     alert("请选择两个国家队！");     returnfalse;}elseif(len>2) {     alert("只能选择两个国家队！");     returnfalse;}else{     returntrue;}

2. Traverse the selected national team.

123	$("input[name=‘nation‘]:checked").each(function(){    alert("已选择的国家队: "+$(this).val());});

3. Cancel all selected national teams.

1	$("input[name=‘nation‘]:checked").attr("checked",false);

4, the designated two national teams selected.

12	$("input[name=‘nation‘][value=‘Germany‘]").attr("checked",true);$("input[name=‘nation‘][value=‘Holland‘]").attr("checked",true);

5. Prohibit the selection of national team.

1	$("input[name=‘nation‘]").attr("disabled",true);

6. Allow the selection of national teams.

1	$("input[name=‘nation‘]").attr("disabled",false);

7. Select the national team with an even or odd index (the index is starting from 0).

1234	//选中索引为偶数的国家队$("input[name=‘nation‘]:even").attr("checked",true);//选中索引为奇数的国家队$("input[name=‘nation‘]:odd").attr("checked",true);

　　

jquery operation <input type= "checkbox";